lib/regex.c

   1 /* Extended regular expression matching and search library.
   2    Copyright (C) 2002-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #define __STDC_WANT_IEC_60559_BFP_EXT__
  21
  22 #ifndef _LIBC
  23 # include <libc-config.h>
  24
  25 # if __GNUC_PREREQ (4, 6)
  26 #  pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
  27 #  pragma GCC diagnostic ignored "-Wvla"
  28 # endif
  29 #endif
  30
  31 /* Make sure no one compiles this code with a C++ compiler.  */
  32 #if defined __cplusplus && defined _LIBC
  33 # error "This is C code, use a C compiler"
  34 #endif
  35
  36 #ifdef _LIBC
  37 /* We have to keep the namespace clean.  */
  38 # define regfree(preg) __regfree (preg)
  39 # define regexec(pr, st, nm, pm, ef) __regexec (pr, st, nm, pm, ef)
  40 # define regcomp(preg, pattern, cflags) __regcomp (preg, pattern, cflags)
  41 # define regerror(errcode, preg, errbuf, errbuf_size) \
  42         __regerror(errcode, preg, errbuf, errbuf_size)
  43 # define re_set_registers(bu, re, nu, st, en) \
  44         __re_set_registers (bu, re, nu, st, en)
  45 # define re_match_2(bufp, string1, size1, string2, size2, pos, regs, stop) \
  46         __re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop)
  47 # define re_match(bufp, string, size, pos, regs) \
  48         __re_match (bufp, string, size, pos, regs)
  49 # define re_search(bufp, string, size, startpos, range, regs) \
  50         __re_search (bufp, string, size, startpos, range, regs)
  51 # define re_compile_pattern(pattern, length, bufp) \
  52         __re_compile_pattern (pattern, length, bufp)
  53 # define re_set_syntax(syntax) __re_set_syntax (syntax)
  54 # define re_search_2(bufp, st1, s1, st2, s2, startpos, range, regs, stop) \
  55         __re_search_2 (bufp, st1, s1, st2, s2, startpos, range, regs, stop)
  56 # define re_compile_fastmap(bufp) __re_compile_fastmap (bufp)
  57
  58 # include "../locale/localeinfo.h"
  59 #endif
  60
  61 /* On some systems, limits.h sets RE_DUP_MAX to a lower value than
  62    GNU regex allows.  Include it before <regex.h>, which correctly
  63    #undefs RE_DUP_MAX and sets it to the right value.  */
  64 #include <limits.h>
  65
  66 #include <regex.h>
  67 #include "regex_internal.h"
  68
  69 #include "regex_internal.c"
  70 #include "regcomp.c"
  71 #include "regexec.c"
  72
  73 /* Binary backward compatibility.  */
  74 #if _LIBC
  75 # include <shlib-compat.h>
  76 # if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3)
  77 link_warning (re_max_failures, "the 're_max_failures' variable is obsolete and will go away.")
  78 int re_max_failures = 2000;
  79 # endif
  80 #endif